Malicious PDF — malware analysis report

Static analysis result for SHA-256 81a6dc15415546a0…

MALICIOUS

PDF

3.8 KB Authoring application: hXr (via va)
MD5: 6c8754472cf5d19bcbab04bde69caa91 SHA-1: f258b4e10da63f720008ae9fcc9023c8d22389ab SHA-256: 81a6dc15415546a0f7a3a64ed7b2ddf589f665d096d27d1bf9940091c5396c06
98 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains an embedded script payload and triggers the CVE-2010-0188 exploit for Adobe Reader. This exploit is designed to download and execute a second-stage payload. The presence of an embedded file further supports the malicious intent.

Heuristics 5

  • Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188
    PDF contains the CVE-2010-0188 exploit template: XFA JavaScript heap-spray setup, a generated TIFF image payload, and assignment of that TIFF data to an XFA image field rawValue to trigger Adobe Reader's LibTIFF parser.
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0041.bin
afccfaa0cfd22b982f889909e3e6815eef1101fe695bc9d15bd659b5231edd11
pdf-embedded-file PDF EmbeddedFile object 41 at offset 0x53 9920 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).